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Ex-Situ Conservation

the gradual c...

Question

the gradual changes that take place in an existing organism which eventually leads to evolution is called speciation
can we say this??

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Solution

Dear Student, Speciation is the process in which new species form.It occurs when a population in the species gets isolated due to any natural Barrier.they are mainly reproductively isolated. Regards

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Q. Formation of a new type of organisms from pre-existing ones due to evolution is called as speciation. Which of the following could be possible reasons for such a process?

Q. Assertion [A]: Evolution is a continuous process that takes millions of years for speciation.
Reason [R]: During evolution, only mutation leads to speciation.

Q. Evolution i.e. changes in an organism to adjust to the environment, as suggested by Charles Darwin, is a very slow process that takes place over tens of thousands of generations, over millions of years. However, in bacteria, development of resistance to antibiotics, which is a type of evolution, takes place within our own lifetime. Can you say why it occurs so quickly in bacteria?

Q. Statement 1: In the process of evolution, one species always gets lost to give rise to new species.

Statement 2: The newly generated species are always better than the existing previous ones.

Statement 3: Natural selection and genetic drift leads to speciation.

Mutation leads to evolution and speciation.

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